Hot water and hot air heating system

ABSTRACT

A furnace for supplying hot water and/or hot air heat for room heating purposes. A sheet metal combustion chamber containing a gas fired log is viewed through a shatterable glass window, this chamber being spaced from a housing affording passages for air to be heated from the walls of the combustion chamber. These passages lead to a plenum chamber on the top portion of the furnace. Within the combustion chamber, and arranged to receive the maximum benefit of the heat from the gas log, is a hot water pipe arranged in serpentine manner. The top of the combustion chamber is closed and the products of combustion pass to the outside through pipes at opposite ends of the combustion chamber which extend through the walls of both the combustion chamber and housing. These pipes are joined outside into a common flue. The hot air passages may be closed by insulation, thereby providing a hot water heating system alone.

HOT WATER AND HOT AIR HEATING SYSTEM [76] Inventor: Raymond R. Dupler,744 Euclid Avenue. Toledo, Ohio 43605 221 Filed: Nov. 26, 1971 [2]]Appl. No.: 202,133

[52] US. Cl. 126/133 [51] Int. Cl. F24c 3/04 [58] Field of Search126/92, 101, 131, 126/133, 132

[56] References Cited UNITED STATES PATENTS 3,181,526 5/1965 Ruegg126/133 2,573,364 10/1951 Scharff..... 126/101 2,969,787 1/1961 Dupler126/92 3,277,275 10/1966 .Brusven 126/101 X 2,533,692 12/1950 Rice126/101 3,567,905 3/1971 Ferraro et al 126/101 X [451 July 3,1973

Primary Examiner-Meyer Perlin Assistant Examiner-Ronald C. CaposselaAttorney-Malcolm W. Fraser ABSTRACT A furnace for supplying hot waterand/or hot air heat for room heating purposes. A sheet metal combustionchamber containing a gas fired log is viewed through a shatterable glasswindow, this chamber being spaced from a housing affording passages forair to be heated from the walls of the combustion chamber. Thesepassages lead to a plenum chamber on the top portion of the furnace.Within the combustion chamber, and arranged to receive the maximumbenefit of the heat from the gas log, is a hot water pipe arranged inserpentine manner. The top of the combustion chamber is closed and theproducts of combustion pass to the outside through pipes at oppositeends of the combustion chamber which extend through the walls of boththe combustion chamber and housing. These pipes are joined outside intoa common flue. The hot air passages may be closed by insulation, therebyproviding a hot water heating system alone.

1 Claim, 2 Drawing Figures PATENTEDJUL3 I975 FIG.

FIG. 2

INVENTOR. Qwmoub E.Dupu:R.

a; izw m Fwvmmuefl HOT WATER AND HOT AIR HEATING SYSTEM INCORPORATION BYREFERENCE In this application there is incorporated by reference US.Pat. No. 2,969,787, dated Jan. 31, 1961, of Raymond R. Dupler, andentitled AIR-HEATER AND SAFETY FEATURE FOR SAME.

SUMMARY OF THE INVENTION A room heater embodying a gas fired log, whichcan be viewed through a window, and the heat from which heats the waterin a pipe which circulates within the combustion chamber. Spaced fromthe walls of the combustion chamber to provide air passages is ahousing, so that the heat from the combustion chamber heats the air inthese passages. Such air passes to a plenum chamber from which it isconducted to the areas to be heated. Similarly, the hot water pipe leadsfrom the top of the furnace and passes to suitable radiators, and thenreturns to the bottom end of the furnace. The hot water pipe within thecombustion chamber is of generally serpentined form, and inclinesupwardly and forwardly above the gas fired log in order to obtain themaximum heat from the log. Thus, a combined hot air and hot waterheating furnace is produced. However, in the event that it is desiredonly to have a hot water furnace, the hot air passages can be filledwith thermal insulation so that only a hot water furnace is available.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is a side perspective view withportions broken away to show the interior of the furnace; and

FIG. 2 is a top rear perspective of the upper portion of the furnacewith parts broken away for the purpose of clarity.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the drawings, thefurnace comprises an upright sheet metal housing which has a steppedfront wall section 111 and Illa, a bottom wall 12, a lower rear wallsection 13, which is open at its lower end, and an upper wall section13a, which gently inclines forwardly and upwardly. Thev housing also hasend walls 14. Within the housing 10, and in general having the sameshape as that of the housing but on a smaller scale, is a sheet metalcombustion chamber 15, the major portion of which is spaced from thehousing. The spacing between the combustion chamber and the housingprovides hot air passages 16 so that the heated walls of the combustionchamber heat the air in the passages 16. Air is admitted from theoutside to the passages 16 through screened openings 17 in the lower endportions of both side walls 14, and also through the opening in the backof the housing below the wall section 13.

The front wall 1 l of the housing has an opening to receive a temperedshatterable glass window 18. It will be observed that there is anopening at the front of the combustion chamber which registers with thewindow panel opening. Disposed within the combustion chamber and-restingupon the floor 115a thereof is a gas fired log 19, the controls forwhich (not shown) are beneath the floor a. With respect to the glasswindow panel 18, suffice it to say that the flow of gas to the g'as'log19 is instantly shut off in the event the panel is shattered, this beingfully shown and described in US. Pat. No. 2,969,787 above referenced.

The top edges of the housing 10 are bent at right angles to provideoutwardly extending flanges 20 on which rest the flanges 21 of arectangular box 22. Suitable fasteners extend through the flanges tohold the parts together. The box 22 provides a plenum chamber to whichthe hot air from the passages 18 passes. In the top wall of the box 22are a number of pipes 23 which lead to registers in the areas to beheated.

Extending from the outside to the underside of the bottom wall 15a ofthe combustion chamber is a hot water pipe 24 which extends upwardlyalong the rear wall of the combustion chamber, and thence along theupwardly and forwardly inclined section of such rear wall. The portionof the pipe in. the forwardly inclined section of the wall is ofserpentine form, in which the sections of the pipe are parallel to eachother and spaced from each other, and the ends of these sections, asindicated at x, are mitered. In other words, the small pipe connectingthe two adjacent parallel sections of the hot water pipe have miteredconnections to each other. This is of importance because it impartsturbulence to the water movement and also retards the flow so as toobtain maximum benefit of the heat from the gas log 19.

The lower run of. the serpentine section is supported on a ledge 25 ofchannel sheet metal suitably secured to the adjacent wall of thecombustion chamber. It will be manifest that by inclining the serpentineform of hot water pipe in the manner shown, that the maximum benefit ofthe heat generated by the log 19 is obtained.

The top end of the combustion chamber in the region of the flange 20 ofthe housing is outwardly flanged to support an imperforate sheet metalplate 26, the edge portion of which is secured by suitable fasteners tothe flanges 27. It will be observed that the upper end portion of thehot water pipe 24 extends through an opening in the closure plate 26,and then passes to suitable radiators in the rooms to be heated, fromwhich the pipe finally returns to the furnace, as will be readilyunderstood. A suitable seal is disposed about the opening in the plate26 through which the pipe 24 extends to prevent any of the products ofcombustion from entering the plenum chamber.

The products of combustion pass from the upper end of the combustionchamber through flue pipes 28 and 28a, which are arranged at oppositeends of the combustion chamber, as shown in FIG. 2 and pass through boththe walls of the combustion chamber and housing. These flue pipes areL-shaped, and join a sheet metal connecting box 29 on the outside fromwhich extends a vertical flue 30 leading to a chimney or the like. Thisarrangement of the flue pipes 28 and 28a provides for the most effectivedistribution of the flue gases in order to capture the maximum heatgenerated within the combustion chamber.

Although I have shown and described the best form of my invention knownto me at this time, it is to be understood that numerous changes indetails of construction, arrangement, operation, and choice of materialsmay be effected without departing from the scope of the invention.

I claim:

1. A heater of the character described comprising a sheet metal housinghaving closed front and side walls,

a rear wall having a forwardly and upwardly inclined upper section, topclosure means for said housing in the form of a box-like member, thelower edge of which is outwardly flanged, flanges on the upper edges ofsaid housing on which the flanges of said box-like member rest and aresecured, a combustion chamber for a gasfired log of similar shape andarranged within and spaced from the side, rear and a portion of thefront wall of said housing, a common opening in the front of saidhousing and combustion chamber, a transparent window panel covering saidcommon opening, a hot water pipe entering from the lower portion of saidcombustion chamber and arranged in a to and fro manner along theinclined upper section thereof to expose a substantial area to heatgenerated therein, an imperforate plate closing the upper end of saidcombustion chamber, the upper end of said pipe projecting through saidimperforate plate, and exhaust flue means for the products of combustionfrom said combustion chamber extending laterally through openings in theupper end portions of said housing and combustion chamber in the regiondirectly below said imperforate plate, said exhaust flue meanscomprising a pair of exhaust pipes arranged respectively adjacentopposite ends of said combustion chamber.

I IO!

1. A heater of the character described comprising a sheet metal housinghaving closed front and side walls, a rear wall having a forwardly andupwardly inclined upper section, top closure means for said housing inthe form of a box-like member, the lower edge of which is outwardlyflanged, flanges on the upper edges of said housing on which the flangesof said box-like member rest and are secured, a combustion chamber for agas-fired log of similar shape and arranged within and spaced from theside, rear and a portion of the front wall of said housing, a commonopening in the front of said housing and combustion chamber, atransparent window panel covering said common opening, a hot water pipeentering from the lower portion of said combustion chamber and arrangedin a to and fro manner along the inclined upper section thereof toexpose a substantial area to heat generated therein, an imperforateplate closing the upper end of said combustion chamber, the upper end ofsaid pipe projecting through said imperforate plate, and exhaust fluemeans for the products of combustion from said combustion chamberextending laterally through openings in the upper end portions of saidhousing and combustion chamber in the region directly below saidimperforate plate, said exhaust flue means comprising a pair of exhaustpipes arranged respectively adjacent opposite ends of said combustionchamber.